The new touchscreen machine is the first of its kind in Chattanooga, and bolsters Taco Mac's non-alcoholic offerings from six originally.

A new specialized soft drink menu offers dozens of variations on popular beverages, such as Raspberry Coke or Peach Sprite, in addition to unusual drinks like carbonated Dasani water.

The general public won't be able to directly interact with the device, which is crew-serve only. Instead, customers will order from a colorful chart which lists all the possible drinks and variations.

However, a self-serve version should be available in Chattanooga within 30 to 45 days, said Coke representative Dan Redler.

The soft drink machine can also "call home" to Coke for new recipes, which are mixed on the spot and poured through a spout that uses technology derived from the medical field to avoid mixing flavors, Redler said.

"If you pour a Coke, then pour a Dasani, the water won't like taste like Coke or be brown," said Bruce Skala, vice president of marketing for Tappan Street Restaurant Group, which owns Taco Mac.